Filtering apparatus.



Patented June I2, |900. W. A. STEVENSN.

FILTERING APPARATUS.I

(Apliction led Apr. 20, 1898. Renewed Mar. 17, 1900.)

2 Sheets-Sheet l.

(No Model.)

@@@QQQQ @@@QQQQ @@@QQQQ Camn/Lewes No. 65|,675. Patentedlune I2, |900.

W. A. STEVENSUN.

FILTERING APPARATUS.

(Application 1e`d Apr. 2Q, 1898. Renewed Mar. 17, 1900.) (No Model.) 2 Sheets-Sheet 2.

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S14/vendez im 5y SMw-ula elblofmwg 'ma N cnms tenant to tank a.

UNITED STATES PATENT OFFICE.

WILLIAM A. STEVENSON, OF NQRTHAMPTON, MASSACHUSETTS.'

FILTERING APPARATUS.

SPECIFICATION forming part of Letters Patent NO. 651,675,dated. June 12, 1900.

Application filed April 20, 1898. Renewed March 17, 1900, Serial No. 9,108. (No model.)

To @ZZ whom t 17mg/ concern:

Be it knownthat LWILLIAM A. STEvENsoN, a citizen ofthe United States of America,- residing at Northampton, (Florence,) .in the county of Hampshire and State of Massachusetts, have invented a certain new and useful Improvement in. Filtering Apparatus, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure 1 is a plan view of the filtering ap-` paratus, including the filter-bed. Fig. 2 is a view in sectional elevation on the plane denoted by the dotted line a: a; of Fig. 1 looking in the direction denoted by the arrow overlying that line. Fig. 3 is a view in sectional elevation on the plane denoted by the dotted line y y of Fig. 1 looking in the direction indicated by the arrow overl-ying that line.

The object of the improvement is the pro? duction of an apparatus for tilteringliquids, notably water.

In the accompanying drawings the letters a and b respectively denote two tanks of sim'- ilar capacity and construction. c denotes a tank intermediate of the two tanks just mentioned and the filter-bed d. The material of the filter-bed may well be sand. The water. to be filtered comes through the intake-pipe e, feeding the unfiltered water alternately to tanks a, and b. l

The letter e denotes that branch of the in-4 take-pipe which feeds the unfiltered 'water to the tank a. j

The letter f denotes a butterfly-valve controlling the admission of Y unfiltered water to tank a. The opening and closing movements of the butterfly-valve f are given through intermediate mechanism by the float g'appurings the parts of the mechanism are shown in the adjustment they have when the float g has closed the butterfiy-valve f and is at rest at In the figures of the draw` the eye of which eye-block the fioat-rod g has vertical play. When the lowermost of l the adj ustable-stops g2 strikes the eye-block 7L', it will thereafter in its upward movement carry the lever 7L with it, giving, .through shaft i, a corresponding rotary movement to pulley 7e. The pulley 7c has chain-belt con nection through chain Z', which is rather loose, so as to permit some lost motion with pulley fm, which in the motion just described carries with it the weighted lever n in the same direction, which lever in that travel, passing the vertical, falls forward by gravity in the same direction of travel and in that g fall closes the valve f and shuts off the inflow of unltered water to the tank a. Thedownward motion of fioat g from the top of its play begins, of course, 'with the opening of the outlet of this tank. The letter o denotes the outlet-"alve of that outlet-a butterflyvalve. The opening of that valve is effected by mechanism which has its initial impulse given in the tank b, the construction and operation of which will be described hereinafter. When the outlet-valve o is thus opened, the inletvalve f being meanwhile closed, it is a matter of course that the Water in tank ct falls and the float gvfalls with it. At the beginning of this falling motion of fioat g the lost motion of the adj ustablestops g2 with reference to eye-block It is first taken u p. Thereafter the further fall of float Vg pulls lever h downward, giving corresponding motion to pulley 7c, chain l, pulley m, and weighted lever n, and accordingly opening the inlet-valvefat the proper time,

, which is'practically when the float g reaches the bottom` of its play, at this point reestablishing theinfiow of unfiltered water into `tank a. In the before-described downward j motionV of the float g it also at the proper time, practicallyat the end of its downward play, closesthe butterfly outlet-valveo by means now to be described; The letter p denotes a `cam 'carried on the side of lever 7L, which,

striking on the stud r, adjustably attached v outlet-valve o vof tank Z) through the medium of shaft z, pulley-z', chain z2, pulley e3, and

IOv

weighted lever e4.

The opening and closing of the inlet-valve of tank d has now been described; also, the closing of its outlet-valve and the simultaneous opening of the outlet-valve of tank b.

Now to describe the opening of' the outletvalve of tank ct. The operating mechanisms in the tanks a and b are duplicates of each other. The opening ofthe outlet-valve of tank ct is accomplished by float a at the clos,- ing of its downward movement through the medium of lever b', (corresponding to 't,) cam b2, (corresponding to 29,) stud b3, (corresponding to rr,) crank-arm b4, (corresponding Vto 8,) shaft e', pulley chain u, pulley u, and Weighted lever w. This opening of the outlet-valve of tank dis simultaneous with the closing of outlet-valveof tank b through mechanism already described. Y

`In tank b the letterZ denotes that branch. of the intake-pipe which feeds lthe unfiltered Water to tank b. The letter a2 denotes the float-rod of float ct. The letter a3 denotes the p adjustable stops on that rod. The lettera4 v the lever b.

operate-said valves-those of one tank alter- -nately with those of the other tank-al1 substantially as described and for the purposes set forth. l

2. In combination, a tank having an inletvalve, the float in and for that tank, the floatrod of that float, the lever adapted ,to be operated-with some lost motion-by that fioatrod, the pulley adapted to be operated by that lever, the chain from that pulley adapted to operate-with some lost motion-va secon d pulley, that second pulley adapted to operate the weighted lever, and the Weighted lever adapted to 4operate in opening and closing said inlet-valve, all substantially as described `and for the purposes set forth.

Y 3. In combination, a tank having an outletvalve, the fioat in and for that tank, the lioatrod of that ioat, the leveradapted to be operated-with some lost motion-bythat floatto pulley It.) 'lhe lett-er fm;i denotes the chain belt (corresponding to chain Z) from pulley m2 to pulley m4, (corresponding to pulley m.) The-letter n' denotes a Weighted lever, (corresponding to weightedlever n.)

The opening and closing of the inlet-valve c of tank b is accomplished` by mechanism i contained within. the tank b, which in construction and operation is a duplicate of that already described for the opening and closing of the inlet-valve of tank a,l it being understood thatin general-one tank is being filled while the other is being emptied,iand vice versa; but the inlet-pipe (and connections) of each of the tanks a andb'is larger than tank, so that each tank is practically filled sult that after the tank isonc'e filled it stands filled vfor a substantial interval before the emptying process begins, a result Whichis a distinct utility in treating the Water with alum or other suitable reagent preparatory tothe passage of the water through the filterter-bed d. After it has passed through the rod, the cam on that lever, the crank-arm operated by thatv cam, the pulley operated by that crank-arm, the chain operated'-With some lost motion-by that pulley, the pulley operated by that chain, the Weighted 'lever operated by the pulley last mentioned, and

vthe outlet-valve adapted to be operated by ,the said` weighted lever, all substantiallyas described andfor the purposes set forth.

4. In combination, a tank having an outletvalve, the lioat in and for that tank, the floatrod of that float, the lever adapted to be operated-With some lost motion-by that fioatrod, the cam on that lever, the crank-arm opl. erated by that cam, the pulley operated by the outlet-pipe (and connections) of the same that crank-arm, the chain operated-With l some lost motion-by that pulley, the pulley in less ktime than it is emptied, with the reoperated by that chain, the Weighted lever operated by the pulley last mentioned, the

said outlet-valve adapted to be operated by l said weighted lever, a second tank, the-outlet-valve of and for said second tank, the

. shaft of said crank-arm, the pulley fixed upon I said shaft within said secondtank, the chain bed. This utility concerns not only the effi- IIO operated-With some lost motion-by the pulthe chain last mentioned, and the Weighted lever operated by the pulley last mentioned and itself adapted'to operate the said outletvalve of said second tank, all substantially as described and for the purposes set forth.

WILLIAM A. sTnvENsoN.

, IVitnesses:

FLORENCE M. BRAGG, CAsPAaSIMoNDs. 

